1) (10 pts) Normal hedgehogs have straight fur and long whiskers. Mutant hedgehogs have been
isolated with either kinked fur or short whiskers. The genes for each of these characters are on
different chromosomes. You capture some hedgehogs and mate them and get the following data.
Number of progeny
mating
genotypes
straight fur and
long whiskers
straight fur and
short whiskers
kinked fur and
long whiskers
kinked fur and
short whiskers
Straight, short
X
Straight, short
30
90
10
30
Kinked, long
X
40
40
Straight, short
40
40
Kinked, short
X
straight, short
40
120
0
0
A
a) (2 pts) For each mutation, indicate whether it is dominant or recessive by filling in the blanks
below with the word dominant or recessive.
The allele for kinked fur is
to the allele for straight fur.
The allele for short whiskers is
to the allele for long whiskers.
b) (2 pts) Define genes and alleles for each trait (using A/a for fur type and B/b for whisker
type).
